Dendritic cell (DC) migration to secondary lymphoid organs is a crucial step to initiate adaptive immune responses. This step requires the expression of a functional CCR7 chemokine receptor on DC undergoing maturation. Here, we show that the natural retinoid 9-cis retinoic acid (9cRA) and the synthetic retinoid fenretinide (4-HPR) specifically inhibit the functional up-regulation of CCR7 on maturing human DCs, without affecting early steps of DC maturation. As a consequence, mature DCs do not migrate in vitro toward the chemokine CCL19. Importantly, 4-HPR and 9cRA by inhibiting the expression of CCR7 on bone marrow-derived murine DCs dampen their in vivo migration to draining lymph nodes. 4-HPR also inhibits the expression of the chemokine receptors CXCR4, therefore, impairing in vitro migration of human DCs to CXCL12 and inhibiting in vivo the CXCR4-dependent migration of the posterior lateral line primordium (PLLp) in zebrafish embryos. Taken together, these data highlight a novel function of retinoids and suggest the possibility of using retinoids to treat inflammatory or autoimmune diseases.
Selected natural and synthetic retinoids impair CCR7- and CXCR4-dependent cell migration in vitro and in vivo / E.J. Villablanca, D. Zhou, B. Vlentinis, A. Negro, L. Raccosta, L. Mauri, A.E.G. Prinetti, S. Sonnino, C. Bordignon, C. Traversari, V. Russo. - In: JOURNAL OF LEUKOCYTE BIOLOGY. - ISSN 0741-5400. - 84:3(2008 Sep), pp. 871-879. [10.1189/jlb.0108047]
Selected natural and synthetic retinoids impair CCR7- and CXCR4-dependent cell migration in vitro and in vivo
L. Mauri;A.E.G. Prinetti;S. Sonnino;
2008
Abstract
Dendritic cell (DC) migration to secondary lymphoid organs is a crucial step to initiate adaptive immune responses. This step requires the expression of a functional CCR7 chemokine receptor on DC undergoing maturation. Here, we show that the natural retinoid 9-cis retinoic acid (9cRA) and the synthetic retinoid fenretinide (4-HPR) specifically inhibit the functional up-regulation of CCR7 on maturing human DCs, without affecting early steps of DC maturation. As a consequence, mature DCs do not migrate in vitro toward the chemokine CCL19. Importantly, 4-HPR and 9cRA by inhibiting the expression of CCR7 on bone marrow-derived murine DCs dampen their in vivo migration to draining lymph nodes. 4-HPR also inhibits the expression of the chemokine receptors CXCR4, therefore, impairing in vitro migration of human DCs to CXCL12 and inhibiting in vivo the CXCR4-dependent migration of the posterior lateral line primordium (PLLp) in zebrafish embryos. Taken together, these data highlight a novel function of retinoids and suggest the possibility of using retinoids to treat inflammatory or autoimmune diseases.
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